If you are willing to tolerate the many, many, many banal ads for other completely vapid games, then this game will provide you with a moderate challenge... at infrequent times. This kind of game is tedious and unrewarding, but Crazy Taxi has a bit of weird drollery which makes it stand apart. I imagine that it is a bit like surreptitiously reading a recently reborn Christians diary: hilarious, pitiable, and a little frightening all at the same time. I have been hooked for two weeks, but I think it is running its course.